A box weighing 550N slides at constant speed across a flat parking lot,under the influence of a stiff wind.The wind applies a force of 155N parallel to the surface of the parking lot.What is the angle relative to the vertical of the contact force applied by the ground.
A) 75$^{\circ}$
B) 74$^{\circ}$
C) 90$^{\circ}$
D) 16$^{\circ}$
E) 15$^{\circ}$

Question

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The Answer of A box weighing 550N slides at constant speed across a flat parking lot,under the influence of a stiff wind.The wind applies a force of 155N parallel to the surface of the parking lot.What is the angle relative to the vertical of the contact force applied by the ground.
A) 75$^{\circ}$
B) 74$^{\circ}$
C) 90$^{\circ}$
D) 16$^{\circ}$
E) 15$^{\circ}$

A Box Weighing 550N Slides at Constant Speed Across a Flat